{
  "manageEntity": {
    "action": "Save",
    "entityId": "2145839425",
    "entityType": "Track",
    "nonce": "0x3fb86d0a59a1c35a0803a0056e44949a327f52e635304ba1a628e00bbcdff207",
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    "signer": "0xdA0eFB0e7b973C487c12501759aDb23012CB5248",
    "userId": "178070"
  }
}